Piezoelectric sensor device with sensor housing and holder for holding a piezoelectric sensor element
a piezoelectric sensor and sensor element technology, applied in the direction of instruments, fluid pressure measurement, weighing by absorbing components, etc., can solve the problems of pressure and force sensors, relatively space-consuming circular crystal design, and inability to rapid exchange crystals subject to fluid stream, etc., to achieve rapid exchange of piezoelectric sensor elements
Inactive Publication Date: 2010-02-16
AVL LIST GMBH
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Enables rapid and secure exchange of piezoelectric sensor elements while maintaining measurement accuracy and stability under temperature changes, with the holder and resonator protected from external influences, ensuring effective fluid contact and gas-tight sealing.
Problems solved by technology
Rapid exchange of the crystals subject to the fluid stream will not be possible, however, with this kind of holder.
Besides, the circular crystal design is relatively space-consuming (see for instance EP 1 316 796 A1).
There are known holders for pressure and force sensors, which are not suitable for receiving a resonator element, however.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037]FIG. 1 and FIG. 2 show a piezoelectric sensor device 1 with a sensor housing 2, comprising a first sensor housing part 2a and a second sensor housing part 2b, where the cap nut has been omitted in FIG. 2. The metal sensor housing parts 2a, 2b position in a gas-tight manner a cylindrical guiding and protecting element 3 in a gas stream to be measured. The guiding and protecting element 3 receives a holder 4 (see FIG. 3 to FIG. 5) for a sensor element 30 configured as a strip-shaped resonator element (strip resonator), which is shown in detail in FIG. 13 and FIG. 14. The resonator element 30 is exposed to the gas stream to be measured via an opening 5 in the lower sensor housing part 2b and a slit 6 in the cylindrical guiding and protecting element 3 (FIG. 6).
[0038]FIGS. 3 to 5 show the holder 4 in detail. The high-temperature-resistant holder 4 is furnished with a clamping element 7, which comprises an elastic arm 7a and a non-elastic arm 7b. Between the elastic first arm 7a an...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| elastic | aaaaa | aaaaa |
| distance | aaaaa | aaaaa |
| high-temperature- | aaaaa | aaaaa |
Login to View More
Abstract
A piezoelectric sensor device, especially for use with a microbalance, with a sensor housing and a holder for holding a piezoelectric sensor element. In order to permit quick exchange of crystals and to minimize the size of the assembly, the holder is configured as a clamping element which has at least one elastic first arm for clamped holding of the contact region of the essentially strip-shaped piezoelectric resonator element, whose measuring region is subjected to a fluid stream to be measured.
Description
BACKGROUND OF THE INVENTION[0001]The invention relates to a piezoelectric sensor device, especially for use with a microbalance, with a sensor housing and a holder for holding a piezoelectric sensor element.DESCRIPTION OF THE PRIOR ART[0002]Known piezoelectric sensor devices, for instance for measuring exhaust gas samples, are furnished with piezoelectric resonator elements with circular cross-section, which are held in a special high-temperature holder for crystals of circular design. Rapid exchange of the crystals subject to the fluid stream will not be possible, however, with this kind of holder. Besides, the circular crystal design is relatively space-consuming (see for instance EP 1 316 796 A1).[0003]There are known holders for pressure and force sensors, which are not suitable for receiving a resonator element, however. EP 0 394 540 B1, for instance, discloses a holder for a tubular piezoelectric pressure sensor, in which a small piezo-ceramic tube is clamped between a membran...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(United States)
IPC IPC(8): G01N3/02
CPCG01G3/13G01N5/02
Inventor SCHAUPERL, RICHARDPRENNINGER, PETERMACHER, JOHANNES
Owner AVL LIST GMBH